Summary of the invention
Technical problem to be solved by this invention is: provide one to have no-voltage controlling functions, and electric current, the voltge surge of switch are little, and reliability is high, the electronic touch-type switch that the life-span is long.
The technical solution adopted in the present invention is: a kind of No-voltage-type electronic touch switch, comprise bridge rectifier, the thyristor switch circuit be made up of thyristor, the pulsed triggering circuit that thyristor forms is sent out by micro-touch, the human body touch circuit be made up of the 4th integrated inverter, pulse blocking circuit and direct current regulation circuit, the input of thyristor switch circuit is connected with the output of bridge rectifier, the control end of thyristor switch circuit is connected with the triggering signal output of pulsed triggering circuit, the current output terminal of pulsed triggering circuit is connected with the input of direct current regulation circuit, the output of human body touch circuit is connected with the input of pulse blocking circuit, a no-voltage testing circuit and no-voltage output circuit is inserted between described pulsed triggering circuit and pulse blocking circuit, wherein, no-voltage testing circuit is made up of the first resistance and the second resistant series, no-voltage output circuit is by the first integrated inverter, second integrated inverter, boost capacitor, drive resistance and reverse charging diode composition, one end of first resistance of no-voltage testing circuit connects the commutating voltage output of bridge rectifier through light-emitting diode, the direct ground connection in one end of the second resistance, the other end of the first resistance is connected with the input of the tie point of the other end of the second resistance with the first integrated inverter of no-voltage output circuit, the output of the second integrated inverter of no-voltage output circuit is through boost capacitor and drive resistance to be connected with the control end that the micro-touch of pulsed triggering circuit sends out thyristor, and the output of no-voltage output circuit is connected with the input of direct current regulation circuit.
Described pulse blocking circuit is following two kinds of circuit preferably: a kind of pulse blocking circuit blocks diode by integrated double D trigger and first and forms, and be also provided with anti-interference and Anti-shaking circuit between the input of the output of human body touch circuit and pulse blocking circuit, anti-interference with Anti-shaking circuit by charging resistor, discharge resistance, discharge diode, first delay capacitor and the 3rd integrated inverter composition, the output of integrated double D trigger blocks diode through first and is connected with the input of the first integrated inverter of no-voltage output circuit, anti-interferencely to be connected with the output of the input of Anti-shaking circuit with the 4th integrated inverter of human body touch circuit, anti-interferencely to be connected with the input of the integrated double D trigger of pulse blocking circuit with the output of the 3rd integrated inverter of Anti-shaking circuit.
The monostable circuit and first that another kind of pulse blocking circuit is made up of the 7th integrated inverter with delay circuit is blocked diode and is formed, the input of the 7th integrated inverter is connected through the output of PNP type triode with the 4th integrated inverter of human body touch circuit, the output of the 7th integrated inverter blocks diode through first and is connected with the input of the first integrated inverter of no-voltage output circuit, and delay circuit is made up of the second delay capacitor and time delay resistance and accesses the input of the 7th integrated inverter.
For improving the performance of this No-voltage-type electronic touch switch further, the further technical scheme of the present invention is: 1, for the pulse blocking circuit adopting integrated double D trigger, also be connected to the start clear circuit be made up of the 4th electric capacity, the tenth resistance and the 6th integrated inverter, the input of the 6th integrated inverter is connected with power supply through the tenth resistance, and the output of the 6th integrated inverter is held with the R of integrated pair of D trigger and is connected.2, described pulsed triggering circuit sends out thyristor by micro-touch, voltage stabilizing didoe, filter capacitor form, the anode that micro-touch sends out thyristor connects the anode of bridge rectifier, negative electrode connects the control end of thyristor through voltage stabilizing didoe, and micro-touch sends out the output of control end through driving resistance and electric capacity to connect the second integrated inverter of thyristor.3, also there is live wire identification circuit, described live wire identification circuit blocks diode by sample resistance, the 5th integrated inverter and second and forms, the input of the 5th integrated inverter is connected with live wire through sample resistance, and the output of the 5th integrated inverter blocks diode through second and is connected with the control end of the 4th integrated inverter of human body touch circuit.4, described direct current regulation circuit is sent out thyristor, voltage stabilizing didoe and filter capacitor by the first resistance in no-voltage testing circuit and the micro-touch in pulsed triggering circuit and is jointly formed.
Beneficial effect of the present invention: no matter in switch just triggering and conducting or be in conducting state, this electronic touch-type switch can guarantee any status switch all in the perfect condition of no-voltage conducting, zero-current switching.Arrange start clear circuit, mislead when sending a telegram here again after avoiding power failure phenomenon.This electronic touch-type switch uses element few, and reliability is high, and cost is low, and opens for stochastic regime no-voltage and provide convenient, and make the electric current of light fixture, electrical equipment, switch, voltge surge reduces greatly, the life-span extends greatly.
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
Embodiment
Embodiment 1
As shown in Figure 1, Figure 2, Figure 3 shows, the No-voltage-type electronic touch switch of the present embodiment comprises the bridge rectifier Q1 be made up of rectifier cell, the thyristor switch circuit be made up of thyristor Q3, to be sent out pulsed triggering circuit that thyristor Q2 forms by micro-touch, no-voltage detects and output circuit (comprising no-voltage testing circuit and no-voltage output circuit), the human body touch circuit be made up of the 4th integrated inverter U1D, pulse blocking and start clear circuit, live wire identification circuit and direct current regulation circuit.The input of thyristor switch circuit is connected with the output of bridge rectifier, the control end of thyristor switch circuit is connected with the triggering signal output of pulsed triggering circuit, the current output terminal of pulsed triggering circuit is connected with the input of direct current regulation circuit, the output of human body touch circuit is connected with the input of pulse blocking circuit, the output of no-voltage output circuit is connected with the input of direct current regulation circuit, in the present embodiment, between human body touch circuit and pulse blocking circuit, be also provided with anti-interference and Anti-shaking circuit.
Described no-voltage testing circuit and no-voltage output circuit are placed in pulsed triggering circuit and between pulse blocking and start clear circuit, wherein, no-voltage testing circuit is composed in series by the first resistance R1 and the second resistance R2, and no-voltage output circuit is made up of the first integrated inverter U1A, the second integrated inverter U1B, boost capacitor C2, driving resistance R3 and reverse charging diode VD3.One end of first resistance R1 of no-voltage testing circuit connects the commutating voltage output (Q1+end) of bridge rectifier Q1 through light-emitting diode VD2, the direct ground connection in one end of the second resistance R2, the other end of the first resistance R1 is connected with the input (the 1st pin of U1A) of the first integrated inverter U1A of no-voltage output circuit with the tie point of the other end of the second resistance R2; This no-voltage sampling mode is the simplest, also reliable.The output (the 4th pin of U1B) of the second integrated inverter U1B of no-voltage output circuit is through boost capacitor C2 and drive resistance R3 to be connected with the control end (gate pole of Q2) that the micro-touch of pulsed triggering circuit sends out thyristor Q2.When integrated inverter U1B exports as low level, power supply VCC charges to boost capacitor C2 through reverse charging diode VD3, driving resistance R3, on boost capacitor C2, polarity is that the right side is just being born in a left side, when U1B exports as high level, superpose with the voltage U C2 on boost capacitor C2, make micro-touch send out thyristor Q2 triggering and conducting with the voltage being greater than power supply VCC.This output circuit is real be a kind of bootstrap circuit boost, and use element few, reliability is high, and cost is low, and opens for stochastic regime no-voltage and provide facility.
Described pulse blocking circuit blocks diode VD4 by integrated double D trigger U2 and first and forms, and be also provided with anti-interference and Anti-shaking circuit between the input of the output of human body touch circuit and pulse blocking circuit, anti-interference with Anti-shaking circuit by charging resistor R4, discharge resistance R5, discharge diode VD5, first delay capacitor C5 and the 3rd integrated inverter U1C forms, the output (the 2nd pin of U2) of integrated double D trigger U2 blocks diode VD4 through first and is connected with the input (the 1st pin of U1A) of the first integrated inverter U1A of no-voltage output circuit, anti-interferencely to be connected with the output (the 8th pin of U1D) of the 4th integrated inverter U1D of human body touch circuit with the input of Anti-shaking circuit, anti-interferencely to be connected with the input (the 3rd pin of U2) of the integrated double D trigger U2 of pulse blocking circuit with the output (the 6th pin of U1C) of the 3rd integrated inverter U1C of Anti-shaking circuit.Anti-interferencely with the feature of Anti-shaking circuit be: discharge resistance R5 resistance is much smaller than charging resistor R4, once electric capacity C5 is discharged, the time of 0.5S is about needed to charge, therefore the output of U1C can keep certain hour constant, to prevent in touch process shake and produce the frequent break-make of switch, affect the life-span of switch and electrical equipment, and the harmful effect of electromagnetic interference.
Described start clear circuit forms by the 4th electric capacity C4, the tenth resistance R10 and the 6th integrated inverter U1F clear circuit of starting shooting, the input (the 13rd pin of U1F) of the 6th integrated inverter U1F is connected with power supply VCC through the tenth resistance R10, and the output (the 12nd pin of U1F) of the 6th integrated inverter U1F holds (the 4th pin of U 2) to be connected with the R of integrated double D trigger U 2.
The effect of pulse blocking circuit exports high level when being electronic switch shutoff, and locking pulse exports.When the effect of start clear circuit is dependence the 4th electric capacity C4 start, voltage is the effect of zero, export high level through the 6th integrated inverter U1F to reset integrated double D trigger U2, guarantee that open state pulse blocking circuit exports high level, accidental power failure can be prevented on-the-spot unmanned, again bright light phenomenon during incoming call.Edge integrated d type flip flop U2 is adopted to be that peripheral circuit is the simplest, reliability is high as the reason of bistable state reverse circuit.Power-on pulse is in blocked styate, because integrated d type flip flop U 2 end is high level, therefore the input of no-voltage testing circuit, output are high level always, but because boost capacitor C 2 every straight effect, in pulsed triggering circuit, micro-touch sends out thyristor Q2 without operating current, and power scr Q3 is in closed condition.The advantage of this design can guarantee any status switch all in no-voltage conducting.Upset after electronic switch touches, after blocking diode VD4 cut-off blockade releasing, if when line voltage instant absolute value is high voltage, no-voltage testing circuit is input as high level, and it is constant that impulse output circuit exports high level, therefore no pulse, until line voltage drops to zero, after boost capacitor C2 reverse charging, electrical network transient voltage absolute value rises to a less positive voltage again and just sends trigger impulse, guarantees conducting near no-voltage.Rush of current is little, obviously can reduce electromagnetic pollution, extends the life-span of switch, electrical equipment, light fixture; If after touching upset, electrical network instantaneous voltage is close to zero, and now voltage negative sudden change does not also produce positive triggering pulse, and micro-touch sends out thyristor Q2 not conducting, only have the absolute value of line voltage to rise to less positive voltage again and just send trigger impulse, remain zero voltage switch; After power scr Q3 conducting, be equivalent to switch short, it be that the zero, first integrated inverter U1A is input as zero, the second integrated inverter U1B exports is zero that bridge rectifier exports, and boost capacitor C2 is reversed full charge, when line voltage zero passage or current over-zero, flow through power scr Q3 electric current and be less than maintenance electric current I H, power scr Q3 automatically shuts down, and therefore power scr Q3 turns off in zero current condition, electromagnetic interference is minimum, also can not produce the overvoltage of transient state.The conducting again when line voltage absolute value rises to a positive voltage again, again and again.Therefore, no matter in switch just triggering and conducting or be in conducting state, electronic touch-type switch is all in the perfect condition of no-voltage conducting, zero-current switching.No-voltage-type electronic touch switch ON state load two end oscillogram as shown in Figure 3.
Described pulsed triggering circuit sends out thyristor Q2, voltage stabilizing didoe VD1 by micro-touch, filter capacitor C1 forms, the anode that micro-touch sends out thyristor Q2 connects the anode of bridge rectifier Q1, negative electrode connects the control end (i.e. the gate pole of thyristor Q3) of thyristor Q3 through voltage stabilizing didoe VD1, and micro-touch sends out the output of control end through driving resistance R3 and electric capacity C2 to meet the second integrated inverter U1B of thyristor Q2.This circuit only can trigger power thyristor Q3 when the supply power voltage of DC power supply VCC exceedes the operating voltage of voltage stabilizing didoe VD1, guarantees the stable of direct current supply voltage.The firm conducting of circuits for triggering is only charged to filter capacitor C1 in fact, when only having that on filter capacitor C1, voltage is slightly larger than voltage of voltage regulation, larger trigger current could be flow through at voltage stabilizing didoe VD1, once power scr Q3 triggering and conducting, charging process terminates automatically, maintains small operating current by filter capacitor C1.Adopt power scr Q3 as switching circuit, action is fast compared with relay, the life-span is long, contactless, no-spark; Low, the overload capacity of price is strong compared with power semiconductor GTR, MOSFET, IGBT, easily realizes that no-voltage is opened, zero-current switching.
Described direct current regulation circuit is sent out thyristor Q2, voltage stabilizing didoe VD1 and filter capacitor C1 by the first resistance R1 in no-voltage testing circuit and the micro-touch in pulsed triggering circuit and is jointly formed.Electronic switch off-state (OFF), charged to power supply VCC through the diode of the first integrated inverter U1A inside by the first resistance R1, electronic switch opening state (ON), send out thyristor Q2 by bridge rectifier Q1 positive output through micro-touch to charge to power supply VCC, voltage stabilizing didoe VD1 plays the supply power voltage effect of stabilized power supply VCC.This direct current regulation circuit is simple, low in energy consumption.
Described live wire identification circuit blocks diode VD6 by sample resistance R6, the 5th integrated anti-phase U1E and second and forms, the input (the 11st pin of U1E) of the 5th integrated inverter U1E is connected with live wire through sample resistance R6, and the output (the 10th pin of U1E) of the 5th integrated inverter U1E blocks pole pipe VD6 through second and is connected with the control end (the 9th pin of U1D) of the 4th integrated inverter U1D of human body touch circuit.The effect of live wire identification circuit is that switch just cannot be opened when switch misconnection is on ground wire N, guarantees personal safety when turning off the light operation.
Described human body touch circuit by touching pin J2, the 4th integrated anti-phase U1D and anti-interference capacitor C7 and induced voltage sample resistance R9 forms.
Embodiment 2
As Fig. 4, shown in Fig. 5, the present embodiment 2 has the bridge rectifier be made up of rectifier cell Q1 in embodiment 1, the switching circuit be made up of power scr Q3, the pulsed triggering circuit that thyristor Q2 forms is sent out by micro-touch, no-voltage detects and output circuit, live wire identification circuit, human body touch circuit and direct current regulation circuit, difference is: the monostable circuit and first that described pulse blocking circuit is made up of the 7th integrated inverter U1G with delay circuit is blocked diode VD4 and formed, the input (the 13rd pin of U1G) of the 7th integrated inverter U1G is connected with the output (the 8th pin of U1D) of the 4th integrated inverter U1D of human body touch circuit through PNP type triode Q4, the output (the 12nd pin of U1G) of the 7th integrated inverter U1G blocks diode VD4 through first and is connected with the input (the 1st pin of U1A) of the first integrated inverter U1A of no-voltage output circuit, delay circuit is made up of the second delay capacitor C8 and time delay resistance R12 and accesses the input (the 13rd pin of U1G) of the 7th integrated inverter U1G.
The monostable circuit of certain hour can be maintained owing to adopting, thus can to save in enforcement 1 integrated double D trigger U2 and switch start clear circuit and anti-interference with Anti-shaking circuit etc. circuit, simplify circuit further, reduce costs.